JPH06347313A - Weight measuring device for injectable material - Google Patents

Abstract

PURPOSE: To provide a pourable material weighing device that can have a variety of connection modes of an air force-feeding system while maintaining high accuracy. CONSTITUTION: A device for weighing pourable material without interruption is provided with a housing 12 with a rotor disposed inside. The material is fed to a pocket of the rotor through a filling inlet part 17 and spurted out of the pocket at a discharge outlet 18 disposed at the housing 12 on the opposite side to a filling means. The housing 12 is fitted to a frame and rotatable in relation to axes I-I passing the center of elastic connecting members 20, 24 for connecting a feed bottle 11 and a discharge duct 28 respectively to the housing 12. The axes I-I can also be extended inclining in relation to a horizontal line. A pressure fluid to be sprayed to the pocket of the rotor can be used to wash the internal space of the rotor before supplying the material to the pocket of the rotor.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to US Pat. No. 4,52.
An apparatus for weighing pourable materials, such as the apparatus described in US Pat. No. 8,848.

[0002]

2. Description of the Prior Art In the above-mentioned U.S. patent (hereinafter referred to as "the above-mentioned patent"), a plurality of pockets of a rotor arranged in a housing and rotatable about a substantially vertical axis are injected through injection inlet portions, An apparatus for continuously weighing a pourable material discharged by supply of pressurized air through a discharge outlet portion which is displaced in a rotational direction of a rotor with respect to an injection inlet portion is disclosed. The housing is rotatable about a generally horizontal axis and is coupled to a force measuring device located off the axis. An injection inlet,
Elastic coupling members are respectively provided at the discharge outlets. The horizontal axis runs through the center of the elastic coupling member so that the force generated by the twisting of the measuring device under load does not affect the measurement.

Although relatively high accuracy would be obtained by using such a measuring device, in the embodiments described in the above-mentioned patent, particularly in the configurations shown in FIGS. 5 and 6, In essence, the elastic coupling means as a compensator is arranged on the horizontal pivot axis, which limits the manner in which the pneumatic feed duct is connected at the discharge.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pourable material weight measuring device which, while maintaining a high degree of accuracy, further enriches the connections of the pneumatic feed system.

Another object of the present invention is to use the pressurized air supplied to deliver the metered material to clean the interior of the rotor of the machine.

Yet another object of the present invention is to provide a pourable material weighing device having a construction which facilitates assembly and maintenance.

[0007]

A measuring device according to the above aspect includes the features of claims 1, 2 and 3.

Further improvements of the device of the present invention are as follows.

(1) The first axis extends into a first plane passing through the center of gravity of the unit containing the housing and the elements mounted thereto, the center of gravity when the device is in the operative position. The apparatus of claim 1 wherein a normal line drawn from the first axis to the first axis extends into a second plane perpendicular to the second axis.

(2) It further comprises a pressurized fluid supply means connected to the housing on the side opposite to the discharge means via another elastic coupling means, and the first shaft is further elastically coupled. The device of claim 1 which also passes through the center of the means.

(3) The pressurized fluid supply means is connected to a region of the housing facing the central internal space of the rotor means, and the outlet portion of the housing on the side opposite to the pressurized fluid supply means. And the coupling means provided between the housing and the inlet of the housing on the side opposite to the discharging means.

(4) The device according to (3), wherein the elastic coupling means included in the discharging means and the another elastic coupling means are arranged in the housing on the side opposite to the injection means.

(5) The device of claim 1, wherein in the operating position of the device, the second axis extends in a substantially vertical direction.

(6) The device according to claim 1, wherein in the operating position of the device, the second axis extends in a substantially horizontal direction.

(7) The device according to (6) above, wherein the injection means is coupled to the peripheral wall of the housing and the pockets are opened radially.

(8) The pressurized fluid supply means is coupled to a region of the housing facing the central inner space of the rotor means, and the outlet portion of the housing on the side opposite to the pressurized fluid supply means. 3. An apparatus according to claim 2, including coupling means provided between the housing and an inlet portion of the housing opposite the discharge means.

(9) The apparatus according to claim 2, wherein the housing is attached to one side of the supporting means.

(10) The discharge means is coupled to the housing on the opposite side with respect to the injection means.
The described device.

(11) The first axis extends into a first plane passing through the center of gravity of the unit containing the housing and the elements mounted thereto, the center of gravity being when the device is in the operative position. 4. The apparatus of claim 3, wherein a perpendicular line drawn from the first axis to the first axis extends into a second plane perpendicular to the second axis.

(12) The apparatus further comprises a pressurized fluid supply means connected to the housing on the side opposite to the discharge means via another elastic coupling means, and the first shaft has the another elastic coupling means. An apparatus as claimed in claim 3 which also extends through the center of the means.

(13) The pressurized fluid supply means is connected to a region of the housing facing the central internal space of the rotor means, and the outlet portion of the housing on the side opposite to the pressurized fluid supply means. The apparatus according to (12) above, further comprising coupling means provided between the housing and an inlet portion of the housing opposite to the discharging means.

(14) The elastic coupling means included in the discharging means and the another elastic coupling means are arranged in the housing on the side opposite to the injection means.
The device according to 3).

(15) The apparatus according to claim 3, wherein the first axis is inclined with respect to a horizontal line.

(16) The apparatus according to claim 1, wherein the first axis is inclined with respect to a horizontal line. The use of a tilted rotatable shaft allows the compensator to be located on the top and bottom sides of the housing and allows the rotatable shaft to pass through the center of all compensators.

If the housing is supported on one side of the frame,
This facilitates the assembly and maintenance work of the device.

Other features and advantages of the device according to the invention will be inferred from the following description with reference to the drawings.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Since the above patent describes a weight measuring device which operates continuously by air pressure, reference should be made to this patent in full, and only the modifications essential to the invention will be described in more detail below. explain.

1 to 3 show the basic structure of the weight measuring device 10. A rotor 14, which is arranged in the cylindrical region of the housing 12, is rotated by a motor 13 about a substantially vertical axis A. A plurality of pockets 16 are arranged around the center internal space 19 of the rotor 14. The pocket passes through the pouring site, especially below the pouring inlet 17 where material is supplied from the bottle 11. In the region of the pocket 16 on the bottom surface side of the housing 12, there is provided a discharge outlet portion 18 at a discharge place, which is displaced from the injection inlet portion in the circumferential direction, and an outlet including an elbow pipe 26 and a feed duct 28. The pourable material is expelled from the pocket 16 through the discharge outlet 18 by the pressurized air supplied through the air inlet 15 towards the duct.

Device 1 as known from the above-mentioned patent
0 is suspended asymmetrically in frame 50 (see FIGS. 7 and 9). This frame is rotatable about an axis I-I. A force-measuring device 30 coupled to the device 10 at a location remote from the axis I-I measures the mass of pourable material filled in the pocket 16 between the inlet inlet 17 and outlet outlet 18. To do. Given the considerable weight of the device 10, high accuracy would only be obtained if the effects of the extra forces caused by the slight pivoting movement of the device 10 about the axis I-I were prevented. . This is the inlet inlet 17, the air inlet 15 and the outlet duct 26/2.
8 by means of elastic coupling members as compensators 20, 22 and 24, which are arranged correspondingly. According to the teachings of the above patents, when the device 10 makes a rotational movement, the axis I-I is compensated in a substantially horizontal direction so that the torsional forces caused thereby are almost completely eliminated during the measurement. Device 20, 22
And through the center of 24.

The embodiment shown in FIGS. 1 to 3 differs from the known device according to FIGS.
Housing 12 so as to improve the discharge of water by gravity
It differs significantly in that it supplies pressurized air from above.

FIGS. 4-6 show a second embodiment of the present invention in which the pressurized air is discharged from the device 10 at the discharge location.
To the air inlet portion 15 via the elbow pipe 26 from the outlet portion 47 on the side opposite to the inlet portion 40 after being guided through the central internal space 19 via the inlet portion 40, rather than being introduced directly into It is characterized by being sent. The advantage is therefore obtained that under high pressure the interior space 19 is kept completely free of pourable material.
Otherwise, the material may leak out of the pocket 16 and collect there.

In the case of the third embodiment according to FIGS. 7 and 8, the particular feature of the invention is that the connection to the discharge location can be considerably varied. Although the axis I-I in the embodiment of FIGS. 1 to 3 and FIGS. 4 to 6 extends horizontally, the axis II-II of the device 10 is not horizontal and the pivot axis is the housing relative to the horizon. The angle is such that it passes through the center of the compensator which can be located both above and below 12.

In the third embodiment of FIGS. 7 and 8, the compensator 46 is simply the bottom side of the housing 12 so that the pivot axis II-II passing through the compensator 20 also passes through the center of the compensator 46. It is attached at the position of the discharge outlet 18 of the. In this embodiment, as will be explained in more detail in connection with FIGS. 15 and 16, discharge to an outlet duct (not shown) by the action of gravity alone would be possible.

It should be noted that the housing 12 of the apparatus 10 is pivotally mounted at both ends by arcuate support arms 12a, 12b with bearings mounted in a suitable manner on the frame 50 as described and illustrated in the above patent. It is supported.
A particularly advantageous one-sided support of the housing 12 is described below with reference to FIG.

As shown in FIG. 8, in this case as well, the device 1
0 is suspended at force measuring device 30 away from axis II-II. With respect to the force introduction direction of the force measuring device 30, the division of the force component in consideration of the tilt position of the axis II-II may be compensated by calibration or calculation.

With respect to the angle of inclination of the axis II-II with respect to the horizontal, this angle is determined by the height of the housing 12 and the horizontal separation between the inlet inlet axis and the outlet outlet axis, from 15 ° to 45 °. Range, especially 20 ° to 30 °
It should be noted that it is in the range of.

FIG. 7 shows another feature of the device of the invention that is applicable to most of the described embodiments.

In this regard, frame 50 typically
It should be noted that due to the rigid connection to the bin 11, the frame 50 carries a slight twisting risk as the vertical, especially lateral, load exerted by the bin 11 changes. As a result, the position of the rotatable shaft II-II is slightly changed, and it is considered that the measurement result is considerably affected. According to the invention, the housing 12 and the rotor 1
4 and the motor 13 and the gears associated with them, and the center of gravity S of the unit is rotatable about the axis II-II.
To prevent such effects by locating in a plane that includes axis II-II and extends in FIG. 7 perpendicular (at an angle of 90 °) to the plane of the drawing. Axis II from the center of gravity
The vertical line drawn at -II extends horizontally in its plane in the operating position of the device.

Furthermore, the direction of introduction of the force into the force measuring device 30 may be chosen to be as perpendicular as possible to this plane (see also FIGS. 15 and 16).

FIGS. 9 and 10 show a fourth embodiment of the device according to the invention, which combines the features of the previous two embodiments.

More specifically, the pressurized air is supplied from below through the compensator 51 to the internal space 19 (FIG. 6) and further through the elbow pipe 26 to the air inlet portion 15, so that the pocket 16 (see FIG. 6) is blown with air from above, the pourable material passes through the discharge outlet section 18,
It is discharged to the feed duct 28 via the compensator 53. Also in this case, the compensating device 20 and the compensating devices 51 and 53 are located on the inclined rotatable shaft II-II.

11 and 12 and FIGS. 13 and 14
Respectively show two embodiments of the measuring device 60 of the present invention, which are different from the embodiments of the above patent and the previous embodiment in that the rotor 14 of the device 60 rotates about an axis B which is substantially horizontal. They differ in that they do. Injection inlet 62
Would preferably be located at the periphery, i.e. at the peripheral wall of the housing 12, and the pockets 56 of the rotor 14 would be open radially.

Also in this case, the compressed air is compensated for by the compensator 22.
And through the elbow pipe 64 to the air inlet 15, the evacuation is performed pneumatically and the pourable material blown out of the pocket 56 is delivered through the elbow pipe 66 and the compensator 24. . In this embodiment, the measuring device 60 is suspended in a frame (not shown) similar to the frame 50 of FIG. 7 so as to be rotatable about an axis III-III, which axis III-III is similar. Through the centers of the compensators 20, 22 and 24. The mass of pourable material which the rotor conveys between the inlet inlet 62 and the outlet outlet 18 is determined by the force measuring device 30, the measuring device 60 being mounted on the force measuring device, the axis III-I.
It is fixed away from II.

13 and 14 obtained by modifying the fifth embodiment.
In the sixth embodiment of the measuring device 60 according to the present invention, the blowout of the internal space 19 (FIG. 6) of the rotor 14 passes the compressed air through the compensator 22, the elbow pipe 84, and the compressed air inlet 82. Further, it is carried out by supplying from the elbow pipe 86 through the discharge outlet 18, the elbow pipe 88 and the compensator 24. The axes III-III likewise pass through the centers of the compensators 20, 22 and 24.

FIGS. 15 and 16 show a weight measuring device 70 of a seventh embodiment, which is a simplified form compared to the previous embodiments. This device may be used as a weight measuring sluice that operates without pneumatic feed. This allows
A member that is simpler than a member that is elastically bonded, that is,
In principle, it is possible to use force-free transfer elements 92, 94, which consist of tube elements, for example 92a, 92b, which fit loosely together.

If some degree of sealing is desired, FIG.
As indicated at 6, the transition section may be covered by a flexible material 92 in the form of a hose or bellows.

Further, as shown in FIG. 16, although the pressure is lower than in the previous case, the work of emptying the rotor 14 may be improved by supplying air through the air inlet portion 99.

Also in this embodiment, FIG. 15 and FIG.
As shown in FIG. 2, the axis II-II lies in a plane passing through the center of gravity of a unit composed of an element rotatable about the axis, that is, the housing 12 and the motor 13 mounted on the axis, and from the center of gravity, the axis II-II. The perpendicular drawn in II extends horizontally in said plane in the operating position of the device.

17 and 18 show an eighth embodiment of the measuring device 80 according to the present invention. In this case, as a modification of the previous embodiment, the rotatable shaft II-II is attached to the frame 97 and the housing. The bearings 91 and 93 arranged only on one side pass from 12 to the side. Axis II-II is preferably connected to housing 12 by a single crank type support arm 12a. Air compensator 22 and S-shaped duct 9
5 to the air inlet portion 15 of the housing 12 and again discharged through the compensator 46. Rotatable shaft
II-II passes through the center of the compensator 20, 22, 46 and extends in a plane through the center of gravity S of the unit of the device 80 which is rotatable about this axis II-II. S to axis II-
The vertical line drawn in II extends horizontally.

Such one-sided support has the advantage of facilitating the operation of the measuring device both in assembly and maintenance.

As is apparent from the above description, a pourable material weighing device has been disclosed which presents various advantages over known devices in various respects. In this regard,
The characteristic feature of the present invention is not limited to the application to the weight measuring device according to the above-mentioned patent, and the deterioration of the measurement result due to the undesired force generated at the connection point between the device and the injection duct and the discharge duct should be eliminated. It should be noted that it is equally applicable to any other weighing device such as

[Brief description of drawings]

FIG. 1 is a schematic front view of a first embodiment of the device of the present invention.

FIG. 2 is a front view of the device of FIG. 1 when rotated 90 °.

3 is a schematic plan view of a housing of the device of FIG.

4 to 6 are views corresponding to FIGS. 1 to 3 in a second embodiment of the device of the present invention.

7 and 8 are views corresponding to FIGS. 1 and 2 in a third embodiment of the device of the present invention.

9 and 10 show a fourth embodiment of the device according to the invention in FIG.
And a diagram corresponding to FIG. 2.

11 and 12 are views corresponding to FIGS. 1 and 2 in a fifth embodiment of the device of the present invention.

13 and 14 are views corresponding to FIGS. 1 and 2 in a sixth embodiment of the device of the present invention.

15 and 16 are views corresponding to FIGS. 1 and 2 in a seventh embodiment of the device of the present invention.

17 and 18 are views corresponding to FIGS. 1 and 2 in an eighth embodiment of the device of the present invention.

[Explanation of symbols]

 10, 60, 80 Weight measuring device 11 Bin 12 Housing 13 Motor 14 Rotor 15,82 Air inlet part 16,56 Pocket 17,62 Injection inlet part 18 Discharge outlet part 19 Center internal space 20,22,24,46,51, 53 Compensation device 26, 64, 66, 84, 86, 88 Elbow pipe 28 Feed duct 30 Force measuring device 40, 99 Air inlet part 47 Air outlet part 50, 97 Frame A, B axis S Center of gravity I-I, II-II, III-III rotation axis

Claims (3)

[Claims] 1. An apparatus for continuously weighing pourable material, comprising: support means; a housing mounted to the support means so as to be rotatable about a first axis; Rotor means arranged rotatably about two axes and arranged around a plurality of pockets; injection means coupled to the housing for supplying the pourable material to the pockets of the rotor means Evacuation means coupled to the housing on the side opposite to the pouring means, offset in the direction of rotation of the rotor means with respect to the pouring means, for receiving the pourable material and discharging it from the pocket; Included in the injecting means and the ejecting means, preventing transmission of force from the injecting means and the ejecting means to the housing, There elastic coupling means and which passes through the center; between the housing and the support means, the weight measuring apparatus characterized by comprising a force measuring means for coupling away from said first axis. 2. An apparatus for continuously weighing pourable material, comprising: supporting means; a housing mounted to the supporting means so as to be rotatable about a first axis; Rotor means arranged rotatably about two axes and arranged around a plurality of pockets; injection means coupled to the housing for supplying the pourable material to the pockets of the rotor means Evacuation means coupled to the housing on the side opposite to the pouring means, offset in the direction of rotation of the rotor means with respect to the pouring means, for receiving the pourable material and discharging it from the pocket; Included in the injecting means and the ejecting means, preventing transmission of force from the injecting means and the ejecting means to the housing, An elastic coupling means passing through the center; coupled to the housing via another elastic coupling means so as to face the discharging means, and the same of the housing together with the elastic coupling means of the injecting means and the discharging means. A pressurized fluid supply means disposed on a side and having the first axis passing therethrough; between the housing and the support means;
And a force measuring means that is coupled away from the axis of the weight measuring device. 3. An apparatus for continuously weighing pourable material, comprising: support means; a housing mounted on one side of the support means so as to be rotatable about a first axis; A rotor means rotatably arranged about a second axis and having a plurality of pockets arranged around it; coupled to the housing and supplying the pourable material to the pockets of the rotor means. An injection means; a discharge means coupled to the housing in a rotational direction of the rotor means with respect to the injection means to receive the pourable material and discharge it from the pocket; the injection means and the discharge means Is included in the first blocking means for blocking the transmission of force from the injecting means and the discharging means to the housing, and the first shaft passes through the center. Resilient coupling means and; between the housing and the support means, the weight measuring apparatus characterized by comprising a force measuring means for coupling away from said first axis.